Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /arch/arm/mach-imx/mach-imx7d.c 
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2015 Freescale Semiconductor, Inc.
 */
#include <linux/irqchip.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx7-iomuxc-gpr.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/regmap.h>

#include <asm/mach/arch.h>
#include <asm/mach/map.h>

#include "common.h"

static int ar8031_phy_fixup(struct phy_device *dev)
{
	u16 val;

	/* Set RGMII IO voltage to 1.8V */
	phy_write(dev, 0x1d, 0x1f);
	phy_write(dev, 0x1e, 0x8);

	/* disable phy AR8031 SmartEEE function. */
	phy_write(dev, 0xd, 0x3);
	phy_write(dev, 0xe, 0x805d);
	phy_write(dev, 0xd, 0x4003);
	val = phy_read(dev, 0xe);
	val &= ~(0x1 << 8);
	phy_write(dev, 0xe, val);

	return 0;
}

static int bcm54220_phy_fixup(struct phy_device *dev)
{
	/* enable RXC skew select RGMII copper mode */
	phy_write(dev, 0x1e, 0x21);
	phy_write(dev, 0x1f, 0x7ea8);
	phy_write(dev, 0x1e, 0x2f);
	phy_write(dev, 0x1f, 0x71b7);

	return 0;
}

#define PHY_ID_AR8031	0x004dd074
#define PHY_ID_BCM54220	0x600d8589

static void __init imx7d_enet_phy_init(void)
{
	if (IS_BUILTIN(CONFIG_PHYLIB)) {
		phy_register_fixup_for_uid(PHY_ID_AR8031, 0xffffffff,
					   ar8031_phy_fixup);
		phy_register_fixup_for_uid(PHY_ID_BCM54220, 0xffffffff,
					   bcm54220_phy_fixup);
	}
}

static void __init imx7d_enet_clk_sel(void)
{
	struct regmap *gpr;

	gpr = syscon_regmap_lookup_by_compatible("fsl,imx7d-iomuxc-gpr");
	if (!IS_ERR(gpr)) {
		regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_TX_CLK_SEL_MASK, 0);
		regmap_update_bits(gpr, IOMUXC_GPR1, IMX7D_GPR1_ENET_CLK_DIR_MASK, 0);
	} else {
		pr_err("failed to find fsl,imx7d-iomux-gpr regmap\n");
	}
}

static inline void imx7d_enet_init(void)
{
	imx7d_enet_phy_init();
	imx7d_enet_clk_sel();
}

static void __init imx7d_init_machine(void)
{
	struct device *parent;

	parent = imx_soc_device_init();
	if (parent == NULL)
		pr_warn("failed to initialize soc device\n");

	imx_anatop_init();
	imx7d_enet_init();
}

static void __init imx7d_init_late(void)
{
	if (IS_ENABLED(CONFIG_ARM_IMX_CPUFREQ_DT))
		platform_device_register_simple("imx-cpufreq-dt", -1, NULL, 0);
}

static void __init imx7d_init_irq(void)
{
	imx_init_revision_from_anatop();
	imx_src_init();
	irqchip_init();
}

static const char *const imx7d_dt_compat[] __initconst = {
	"fsl,imx7d",
	"fsl,imx7s",
	NULL,
};

DT_MACHINE_START(IMX7D, "Freescale i.MX7 Dual (Device Tree)")
	.init_irq	= imx7d_init_irq,
	.init_machine	= imx7d_init_machine,
	.init_late      = imx7d_init_late,
	.dt_compat	= imx7d_dt_compat,
MACHINE_END